Ma. Ernstrussell et al., SYNTHESIS OF THE PENTASUBSTITUTED LICHEN P-TERPHENYLS BUTLERIN-A, BUTLERIN-B AND BUTLERIN-C, Australian Journal of Chemistry, 51(11), 1998, pp. 1037-1043
Total syntheses of the p-terphenyls butlerin A (1) (3',4,4 '',6'-tetra
methoxy[1,1':4',1 ''-terphenyl]-2'-yl acetate), butlerin B (2) (3',4,4
'',5'-tetramethoxy[1,1':4',1 ''-terphenyl]-2'-yl acetate) and butleri
n C (3) (3',4,4 ''-trimethoxy[1,1':4',1 ''-terphenyl]-2',6'-diyl diace
tate), previously isolated from the lichen Relicina connivens, are rep
orted.